PSLE
Tiffany and Lynn folded paper cranes over two days. On Wednesday, Tiffany folded 6 paper cranes more than Lynn. On Thursday, Tiffany folded another 31 paper cranes and Lynn folded another 17. At the end of the two days, Tiffany made ⁵₈ of the total number of cranes. What was the number of paper cranes that Tiffany folded?

	Tiffany	Lynn	Difference
Before	1 u + 6	1 u	6
Change	+ 31	+ 17
After	1 u + 37	1 u + 17	20
Comparing between Tiffany and Lynn in the end	5 p	3 p	2 p

Difference between the number of paper cranes that Tiffany and Lynn folded in the end is repeated.

Difference between the number of paper cranes that Tiffany and Lynn folded in the end
= 5 p - 3 p
= 2 p

Difference between the number of paper cranes that Tiffany and Lynn folded in the end
= (1 u + 37) - (1 u + 17)
= 1 u + 37 - 1 u - 17
= 37 - 17
= 20

2 p = 20

1 p = 20 ÷ 2 = 10

Number of paper cranes that Tiffany folded
= 5 p
= 5 x 10
= 50

Answer(s): 50